1. Is the current of the power adapter good? The unit of battery capacity is mAh (milliampere-hour), and the unit of current is A (ampere) or mA (milliampere). The two are not the same physical quantity, and the battery capacity and charging current are not the same. necessarily contact.

2. Is the current of the power adapter large? The current value marked on the mobile phone charger (actually called the power adapter is more suitable) is the maximum output current, not the charging current, so they cannot be confused. The charging current of the battery is controlled by the charging circuit inside the mobile phone, not determined by the adapter. Therefore, the greater the rated maximum output current, the greater the power of this adapter, and it can replace other low-power adapters with the same voltage. In addition, there is a regulation in electricity that the power supply with the same voltage, the high current can replace the low current, and vice versa, because if you use a particularly small adapter to charge, the adapter may be in an overloaded state, which will burn the adapter.

What does the output current of the power adapter mean? The output voltage of the power adapter needs to be equal to the input voltage of the electrical equipment (or the electrical equipment specifies that the input voltage is within a range, and the output voltage of the adapter is within this range)

The output current of the power adapter is the maximum current that the adapter can output, and the actual output current is determined by the electrical equipment. (Simply put, it depends on the impedance (external resistance) of the electrical equipment and the impedance inside the power adapter (internal resistance) I=U/(R inside + R outside)).

The (maximum) output current of the power adapter actually represents its internal resistance (the larger the output current, the smaller the internal resistance, that is, the power consumed by the adapter itself is small, and the power available for external use is large).

Therefore, the key to whether the exchange can be used depends on the nominal input current of the electrical equipment. If the nominal input current of the electrical equipment is less than the output current of the power adapter, it can be used. Otherwise, it will not be carried, but it will not damage the device.